Finger control attachment wrench



Nov. 3, 1953 H. B. EVANS FINGER CONTROL ATTACHMENT WRENCH Filed Sept. 7, 1951 FIG. 2

FIG. 4

' Fla. 5

INVENTOR. HERMAN B. EVANS Wigwam! A T TOR/VEYS Patented Nov. 3, 1953 UNITED STATES PATENT OFF! CE 2,657,603 7 FINGER CONTROL ATTAoHMENT WRENCH Herman Buford Evans, United States Navy Application September 7, msiseeierse. 245,623 2 Claims. ('01. ti -53) (Granted under Title 35,11 s. cede (1.952),

sec. 2 6) The present invention relates to an improved tool particularly adapted for reaching and removing relatively inaccessible threaded objects.

An object of the invention is to provide a tool having a main body or stem to which may be pivotally attached a plurality of different sizes and patterns of wrench or jaw members.

Another object of the present invention is to furnish means for quickly connecting and disconnecting the various wrench members and the body members so that a minimum of time is used in replacing one wrench size or pattern with another.

Still another object is the provision of a hand "grip mounted on one end of the stem and a pair of fingercontrol rings positioned adjacent thereto, said control rings being connected by flexible cable to said wrench means. Pivotal movement of the wrench means for varying the angle thereof with respect to the stem occurs upon manipulation of the control rings by the operator.

Further objects and advantages of the invention will be apparent from the following description taken with the accompanying drawing in which:

Fig. l is a plan view of the present invention;

Fig. 2 is a side elevation of the wrench;

Fig. 3 is a sectional view taken on line 3-3 of Fig. 2;

Fig. 4 is an elevation of the means provided for attaching the body member to the wrench means with the latter in position for removal or connection;

Fig. 5 is a view similar to Fig.4 showing the parts connected together;

Fig. 6 is a view similar to Figs. 4 and 5 showing the parts in locked assembled relation.

Similar reference characters represent similar parts throughout the drawings.

In working on engines in general, and more particularly those of the aircraft type, numerous parts secured by bolt and. nut means or bolt means alone are relatively inaccessible with ordinary tools. In order to remove one part of the engine for repair it may be necessary to remove several other parts. Many times this is due to the lack of a tool which is capable of reaching the bolts and nuts which secure the part to the engine. For example, removal of the propeller governor requires the initial removal of the magneto, and the starter or generator cannot be removed without removing each other. The exhaust stack is an example of another part which is quite inaccessible. The present wrench has been devised to permit the mechanic to have ready thereof.

access to these parts so as to require only a small .part of the time ordinarily used in removing them.

[Referring now to the drawings, a main body or stem i0 is provided, there being a cross-piece in the form of a handle II secured to one end While, the stem is shown to be of rectangular configuration, it is apparent that other shapes could be used. The other end'of the stem is recessed to provide a shoulder "l2 and a "land l3. A pivot pin M is secured to the land in a position spaced from shoulder l2, said pin projecting slightly above the surfaceof the stem.

The wrench 15 which I have shown is of the has a generally flat surface on the upper side ,thereof, An elongated strip of spring metal, ilvlustratedby numeral I9, is mountedin juxtaiposed relatio'n to said surface and is secured to the stem by rivets 20. One end of strip I 9, illustrated as l9a, is skewed with respect to the strip, as shown in Fig. 4. Thus the end of shank I1 is permitted to enter between end 19a and stem I0 so that pin l 4 may be received by aperture I 8, as seen in Fig. 5. A ring 2| which encompasses stem I0 and strip I9 is slidably mounted with respect thereto. By sliding the ring toward the recessed end of the stem, end l9a is yieldingly moved into contact with the stem until an aperture 22 is received by pin I4, as shown in Fig. 6. Thus, wrench l 5 is secured to stem ID for pivotal movement with respect thereto in a manner permitting easy and quick removal should a difierent size or type of wrench be desired. It will be understood, of course, that wrench l5 could be of various other designs depending upon the need. For example, a ratchet type socket wrench could be substituted.

The pivotal movement of the wrench is controlled by the operators fingers. The relative inaccessibility of the many parts of an engine make this control necessary. Sleeves 23 and 24 are secured to oposite sides of the stem by suitable means so that the sleeves extend longitudinally thereof. Flexible cables 25 and 26 are slidably received by said sleeves which act as guides therefor. One end of cable 25 is connected to ear 2'! through detachable coupling ring 28 which is received by eyelet 29. One end of cable 26 is similarly connected to ear 30 through ring 31 which is received by eyelet 32. The opposite ends of cables 25 and 28 are connected to finger control rings 33 and 34 respectively. Thus the operator places his hand on the handle and two fingers in the rings provided. By first pulling on one cable and then the other the angular relation between the wrench shank and the body member is varied.

Th use of this wrench for reaching relatively inaccessible bolts and nuts has greatly reduced the time necessary for removing various engine parts. As stated heretofore many parts may now be removed without removing other parts which ordinarily had to be removed. The detachable coupling provided between the wrench and the stem makes for quick changing from one size or type of wrench to another. By placing the hand on handle II and grasping rings 33 and 34 with the fingers, jaws 16 may readily be placed in position on the bolt or nut to be removed.

While I have disclosed a specific embodiment of the invention it will be realized that various modifications thereof could be made without departing from the spirit and scope of the invention, as defined in the appended claims.

The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.

I claim:

1. A tool for removing threaded objects in relatively inaccessible places comprising an elongated body member, wrench means, means detachably securing said wrench means to one end of said body member for pivotal movement, and means including a flexible cable connected to said wrench means for controlling the pivotal movement thereof, said detachable securing means including a pivot pin mounted on said one end of said body member, said wrench means having an aperture therein for receiving said pivot pin, a resilient strip mounted on said body member with a free end extending over but flexed from said one end of said body member and having an aperture in said free end adapted to receive the end of said pivot pin when the strip end and body member are moved adjacent each other, and means surrounding a portion of said strip and said body member for maintaining them in said adjacent relation.

2. A tool for removing threaded objects in relatively inaccessible places comprising an elongated body member, wrench means, means detachably securing said wrench means to one end of said body member for pivotal movement, said detachable securing means including a pivot pin mounted on said one end of said body member, said wrench means having an aperture therein for receiving said pivot pin, a resilient strip mounted on said body member with a free end extending over but flexed from said one end of said body member and having an aperture in said free end adapted to receive the end of said pivot pin when the strip end and body member are moved adjacent each other, and means surrounding a portion of said strip and said body member for maintaining them in said adjacent relation.

HERMAN BUFORD EVANS.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 245,122 Bishop Aug. 2, 1881 395,598 Waggoner Jan. 1, 1889 922,258 Caven May 18, 1909 1,295,072 Schanno Feb. 18, 1919 1,389,200 Linde Aug. 30, 1921 1,411,970 Ligon Apr. 4, 1922 1,616,121 Gruber Feb. 1, 1927 2,357,595 McPherson Sept. 5, 1944 2,538,006 Keppler Jan. 16, 1951 FOREIGN PATENTS Number Country Date 486,757 Germany Nov. 25, 1929 504,450 France Apr. 15, 1920 

